VR6 timing system
The drive of both camshafts is not carried out directly, but through an intermediate gearbox formed by the intermediate shaft sprockets and two chains.
This design of the drive allows you to reduce the dimensions of both camshaft sprockets, which in turn allows you to make the block head more compact. The tension of the drive chain for both camshafts of the Volkswagen Transporter T4 is provided by a tensioner, which is held in position by a bolt located outside. The chain between the crankshaft and the intermediate shaft is also equipped with a tensioning device (hydraulic principle of operation), which does not require adjustment. It should not be forgotten that this tensioner is equipped with a lock, which must be used if it is necessary to dismantle the chain. A large guide presses the camshaft drive chain and reduces its runout. The same guide is available for the lower chain. Bolts and axles are used to fasten these guides.
Volkswagen Transporter engine . Volkswagen Transporter T4 - Specifications .